Eichler, Hj. (1965), Supplement to J.M.Black's Flora of South Australia (Second Edition, 1943-1957): 76 [secondary reference]

taxonomic synonym: Lepidosperma tetragonum Labill. legitimate taxonomic synonym: Cladium tetraquetrum Hook.f. legitimate taxonomic synonym: Cladium tetragonum (Labill.) J.M.Black legitimate

• Comment: nom. inval. under ICBN Art. 33.4 (Vienna Code, 2006), as reference to the basionym is not full and direct (title of work and page number not cited).

Council of Heads of Australasian Herbaria (2012), Australian Plant Census: - [taxonomic synonym]

taxonomic synonym of: Baumea tetragona (Labill.) S.T.Blake legitimate

Council of Heads of Australasian Herbaria (7 July 2021), Australian Plant Census: - [taxonomic synonym]

taxonomic synonym of: Machaerina tetragona (Labill.) T.Koyama ex Jessop legitimate

---